Tetris

To start off my time with Godot I've decided for my first personal project to be a game of Tetris! I started this on 08/05/2024 and it is currently an ongoing project.
Assets from: https://unluckystudio.com/free-game-artassets-15-tetris-game-assets/
Goals to accomplish:

1. Create tetris pieces.
2. Make it so the tetris pieces have a steady falling rate which can be sped up when the user presses the down arrow key.
3. Make it possible to move the pieces in air from the right and the left using the left and right arrow keys.
4. Make it possible to move the pieces in air in increments of 90 degrees using the up arrow key.
5. Have a preview of the next piece and a score counter.
6. Have the next piece be randomly generated.
7. Make it so pieces cannot overlap with each other and instead stack.
8. When a row of pieces is full have it disappear and add to the score.
9. When a piece touches the top of the game area have the game be over.

This is a rather long list and some items can be combined for simplicity however I think it's beneficial to seperate everything so I can do one step at a time. Now that I know what is essential for this Tetris game I'm going to explain how I plan to accomplish all of this:

1. Make 2D character bodies for each piece and give each body two child nodes. One of the child nodes is the sprite which I imported my asset's texture into and the other child node is the collision body. Given the piece I sometimes had to add an extra child node as the shape was irregular. I plan to use these collision bodies so that I don't have to write as much code when it comes to the blocks overlapping. I will still likely have to make an array to keep track of which spaces are filled so I can determine when a full row is filled. To have multiple pieces for the same 2D character body I will create a new scene with my pieces and instantiate it.
2. I plan to use a function with delta to give them a steady falling rate. I will also add a userinput key under project settings of the down arrow which will increase the rate of their y decreasing. I will create variables to keep track of the pieces' y.
3. I will create user input keys, left arrow and right arrow, which will move the pieces to the left and right.
4. Like above, I will create user input key, up arrow which will rotate the current piece 90 degrees.
5. I will randomly generate the next piece and create a variable for it which will show it's 2DSprite in the next box and and I will make a variable to keep track of the score and add on to that whenever my row cleared function goes off.
6. I will learn how to generate a random number and then each random number will correspond with a different piece.
7. I am using 2D Collision bodies to try and prevent overlap I'm not exactly sure how to code interactions between collision bodies yet so I will learn how to do this and return with my newfound knowledge.
8. I am going to have to keep track of which pieces are filled using an array, preferably an array[][] but I am not sure if Godot has this so I will find out. Then I will run a for loop to see if column i is completely filled, I will use 1 to denote filled and 0 to denote empty.
9. I am going to set this up with 2D Collision bodies, adding a new collision body on another layer to the top of the game area and giving it the interaction to end the game when the piece intersects with it.

All of this being said given my limited experience with Godot these plans are subject to change, however I wanted to plan everything out better this time so I wouldn't have to redo as much as I did in my previous project.